How do I solder off metal bit on new Wii laser lens?

What are the necessary steps and equipment needed to solder off the metal bit on a new Wii laser lens (RAF-3355)? Is it even necessary to solder or can the metal be removed some other way? Why does a new laser lens come with this metal bit if it will only have to be removed for the lens to function? What purpose does it serve?

Sorry for all the questions, but I am extremely inquisitive by nature.